Switch default Haskell compiler to GHC 8.0.1.

pkgs/development/haskell-modules/configuration-hackage2nix.yaml

@@ -1,32 +1,34 @@
 # pkgs/development/haskell-modules/configuration-hackage2nix.yaml
 
-compiler: ghc-7.10.3
+compiler: ghc-8.0.1
 
 core-packages:
-  - array-0.5.1.0
-  - base-4.8.2.0
-  - binary-0.7.5.0
-  - bin-package-db-0.0.0.0
-  - bytestring-0.10.6.0
-  - Cabal-1.22.5.0
-  - containers-0.5.6.2
-  - deepseq-1.4.1.1
-  - directory-1.2.2.0
-  - filepath-1.4.0.0
-  - ghc-7.10.3
-  - ghc-prim-0.4.0.0
-  - haskeline-0.7.2.1
-  - hoopl-3.10.0.2
-  - hpc-0.6.0.2
-  - integer-gmp-1.0.0.0
-  - pretty-1.1.2.0
-  - process-1.2.3.0
+  - array-0.5.1.1
+  - base-4.9.0.0
+  - binary-0.8.3.0
+  - bytestring-0.10.8.1
+  - Cabal-1.24.0.0
+  - containers-0.5.7.1
+  - deepseq-1.4.2.0
+  - directory-1.2.6.2
+  - filepath-1.4.1.0
+  - ghc-8.0.1
+  - ghc-boot-8.0.1
+  - ghc-boot-th-8.0.1
+  - ghc-prim-0.5.0.0
+  - ghci-8.0.1
+  - haskeline-0.7.2.3
+  - hoopl-3.10.2.1
+  - hpc-0.6.0.3
+  - integer-gmp-1.0.0.1
+  - pretty-1.1.3.3
+  - process-1.4.2.0
   - rts-1.0
-  - template-haskell-2.10.0.0
-  - terminfo-0.4.0.1
-  - time-1.5.0.1
-  - transformers-0.4.2.0
-  - unix-2.7.1.0
+  - template-haskell-2.11.0.0
+  - terminfo-0.4.0.2
+  - time-1.6.0.1
+  - transformers-0.5.2.0
+  - unix-2.7.2.0
   - xhtml-3000.2.1
 
 default-package-overrides:

pkgs/top-level/all-packages.nix

@@ -4486,7 +4486,7 @@ in
 
   haskell = callPackage ./haskell-packages.nix { };
 
-  haskellPackages = haskell.packages.ghc7103.override {
+  haskellPackages = haskell.packages.ghc801.override {
     overrides = config.haskellPackageOverrides or (self: super: {});
   };